<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <script src="./js/vue.js"></script>
</head>
<body>
    <div id="app"></div>
    <script>
        const app = new Vue({
            el:'#app',
            data:{
                message:'Hello World'
            },
            created:function(){
                console.log('created');
            },
            mounted:function(){
                console.log('mounted');
            }
        });
    </script>
</body>
</html>